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ML4770 Datasheet(PDF) 4 Page - Micro Linear Corporation

Part No. ML4770
Description  2 Cell, Adjustable Output, High Current Boost Regulator with Load Disconnect
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Maker  MICRO-LINEAR [Micro Linear Corporation]
Homepage  http://www.microlinear.com
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ML4770 Datasheet(HTML) 4 Page - Micro Linear Corporation

   
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ML4770
4
Q1 ON
Q2 OFF
Q1 OFF
Q2 ON
IL
VL2
IL(MAX)
ISET
VOUT
0
0
Figure 1. Application Test Circuit
Figure 3. Inductor Current and Voltage Waveforms
Figure 2. PFM Regulator Block Diagram
VL2
5
VOUT
6
+
SHUTDOWN
CONTROL
7
SHDN
VIN
2
2.57V
START-UP
3
GND
VL1
1
SYNCHRONOUS
RECTIFIER
CONTROL
BOOST
CONTROL
SHDN
+
+
8
PWR GND
A1
A2
A3
Q1
Q2
Q3
VOUT
4
SENSE
COUT
R1
R2
IL
ISET
RSENSE
ML4770
IOUT
100µF
100µF
VIN
27µH
(Sumida CD75)
VL1
VIN
GND
SENSE
PWR GND
SHDN
VL2
VOUT
268k
259k
VIN


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